  
<tr data-toggle="collapse" data-target="#demoa<?php echo $id ?>" class="accordion-toggle">
                    <td><?php echo $id+1 ?></td>
                    <td class=' product-img'><img src=<?php echo  base_url('assets/userfile/img/products/MK001.jpg')?> class="img-rounded" width="40px" height="40px"></td>
                    <td class='text-info'  >MK00<?php echo $id ?></td>
                    <td class="text-success">Móc Khóa Chữ A<?php echo $id ?></td>
                    <td class="text-error">$<?php echo $price ?></td>
                    <td class="text-warning"><?php echo $saleoff?>%</td>
                    <td><button class="btn btn-primary btn-delete" type="button">
                            <span class="glyphicon glyphicon-trash"></span>
                            <?php echo $this->lang->line('delete');?>
                        </button>
                    </td>
                </tr>                 
                <tr >
                    <td colspan="7" >
                        <div class="collapse out" id="demoa<?php echo $id ?>">
                            <?php 
                                    $this->load->view('manage_products/edit_manage_listproducts')
                            ?>                     
                        </div>
                    </td>
       </tr>